18492309556 has 12 divisors (see below), whose sum is σ = 36984619168. Its totient is φ = 7925275512.

The previous prime is 18492309497. The next prime is 18492309559. The reversal of 18492309556 is 65590329481.

18492309556 is an admirable number.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18492309559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330219786 + ... + 330219841.

Almost surely, 2^18492309556 is an apocalyptic number.

It is an amenable number.

18492309556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18492309556 is a wasteful number, since it uses less digits than its factorization.

18492309556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660439638 (or 660439636 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 18492309556 in words is "eighteen billion, four hundred ninety-two million, three hundred nine thousand, five hundred fifty-six".